Checking Umts Block - LG KU380 Service Manual

4.6 Checking UMTS Block

4.6.1 Checking Tx level
L101
3.3nH
C101
1.5p
WCDMA
TP2
L123
1.8nH
FL102
4 1
PGND RX
3 2
ANT TX
ACMD-7602
L126
12nH
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Only for training and service purposes
SW100
G2
ANT RF
G1
KMS-507
L102
15nH
U100
+VPWR
3.9p
C154
C157
NA
20dB
U103
CP0402A1950DNTR
PWR_DET
R122
R123 R124
47
130 130
7dB
4. TROUBLE SHOOTING
TP1
TP2
TP3
TP4
TP1
C100
56p
L103
100nH
TP3
NEAR TO PAM
C149 C151
4.7u
1u
AWT6277R U104
11
GND5
10 1
VCC2 VCC1
C155
9 2
10p
GND4 RFIN
8 3
RFOUT GND1
7 4
GND3 VMODE
6 5
GND2 VREF
L127
15nH
- 81 -
TP4
C148
NEAR TO PAM 8.2p
+VPWR
C152
L122
1u
NA
PA_R0
NEAR TO PAM
C158 TR100
KRX102U
100p
PA_ON
VREG_TCXO_2.85V
C162
100p
LGE Internal Use Only
O
L121
G
5.6nH